Chain-adjusting device



0 t 7,193o. Y F; L. Mm; 1,777,521

0mm! ADJUSTING DEVICE Filed Dec. "29, 1926 2 Sheets-Shoot l 0a. 1, 1930; F. LIMORSEY 1, 717,5z1

CHAINADJUSTING DEVICE Filed Dec) 29:, 1926 2' Sheets-Shut 2 awuewto'a Patented Oct. "7, l 1930 i 5 slack run of chain.

Li) materially reduced. 7 I How the foregoing, together with such, other-objects and advantages as may herein-J after appear, or are incident tothe invenjjl ticn, are realized, isillustrated in preferred form in the accompanying drawings, Where FRANK on IrHAon, nnwYonmAoo-nronnrlon oFNEwYoRK i.

MonsE; on l rmnncn, I NEW YORK,

ASSIGNOR--TO nonsn cHnIncoMr ANY,

CHAIN-ADJUSTING nnvxon' Ap'plie ationlflled December 29, 192'6.;,ssi.;.1 no. 157,639.

This invention relates to improvements in chain adjusters operatingfto take up slack in endless chains and particularly to that class of chain adjusters which operate on the The invention is ,especially useful. in association with front end drives for automobiles. j

One of the primary objects ofmy invention is to provide a simple andflefiective adwhich operates to keep thechain in proper running tension without producing excessive backbend inthe chain.

Another object of my invention is to pro- 5 vide an adjusting device operatlng on the chain wlth annnilnurn of pressurethere against.

More specifically it is airned to provide 1 chain adjusting device in which noise is very drive for automobiles and illustrates the application of my improved adjusting device thereto. v p c Fig. 2 isan enlarged face view of the ad-} j j strains'jfdt will alsofbelnoted, due'to the fact justing device shown in Fig. 1.

Fig; 8 1s asection taken on the line 33 of Fig. 2, looking in the direction of the ary j j position of least pressure againstthe chain. This, together withjthecurvature 'abovenieri "ftioned," greatlyreduces nois so that a comparativelyjquiet running device isfobtained, re resher insureflquietness operation, I

111mprovided noisefl absorbing material 14;? j at the joints and at otherpoints o'f'the' device 3 rows.

the invention.

modifications of the invention.

Re'ferringto the drawings, it will be seen that-the particular device to which the inautomobiles of triangular layout, compris mg a casing 8,.a crankshaft sprocket 9, a

the chain 12.

justing device of the character described Fig. 1 is-a face view of a modified form of vention is applied is a front end drive 'for inent', I have provided means associated was the lever'sldand 16 for preventing "their" cam shaft sprocket 10, and an accessory shaft sprocket 11, drivingly connected by means of The adjusting device indicated bythe ref- "erenee letter A operates on the slack run of chain 13 to take up slack therein,which Inaintains' the chain inproper running tension. This device comprises a shoe-like member 14, in this instance, formed of flexible metal, 65

such as-fiat spring steel, connected at its ends to the free endsof the levers or pivoted arms 15. and-'16 by means ofthe v I It will be noted that this shoe-like member 14;

pins 17 and 18.

has a chain contacting surface of consider able radius, which surface is preferably lined' "with noise absorbing material;v such as durable leather. The'levers 1 5 and 16,-arejpiv-.

otally mounted on the pin or stud 1'9,=-which stud is secured in the casing 8, and they V arec'onnectedby means ofja coil spring "20" operating on the levers, in such manner that their free ends tendtd-Inove in an upward V direction toward'each other. 'Thus,jit will be 'seenthat'there is a fo'rceoperating-on the shoe j neniher 14 to press itagainst the slack rurr of? chain 13- -Whereby any slack which "may tend to developin the chain isautomatically itakenflup. v r Inthis connection, it; is to beobserved that r j virtue of the fact thatthe contacting sun-1 Fig. 1 is a face View of a typical front end; j

radius, the operation on the chain is such that excessive, back-bend, when" tensioning,

face ef the shoe member 14 is of considerable does notresult, and; consequently, the p'arts of the "chain are notflsubjecte'd to undue that are adjusting device is rockingly mounts edjon the pin 19, that it is free'to" move to its where noise tends to occur, see Fig.

ln'order to preventthe -adjusting device from "returning to positionsof looseradjust.

being moved against theaction of thespring I ting the' adjustment.

sociation with the teeth by means of a spring.

I am aware of the fact that adjusting devices operating on the slack run of the chain have been heretofore employed, but such devices employ' sprocket wheels. of small radius in comparison tothe radius of'the shoelt, F which',-a:tter several adjustments have been made, produces excessive back-bend of the -chain, resultingin obj ectionablestra' n a and noises.- ltiisheregpointed outthat owing to the nature of such'sprocket wheel devices, it is impossible to sufiiciently increase the diameter of the sprockets to obtain the advantages of the present invention because suflicient movement could not be obtained to properly-tighten"the chain.

In Figs. 4 andj5, I have shown a modifical tionfemploying alspiral sprin g23 for effect- In this instance, the evers15and 16 are provided with cupped portions24 in which thesprin'g 23 is housed.

As before, theselevers are pivotally carried spin, 19- securedto the casing 8. In this nstance, theratcliet teeth 21?, for preventing I zsgbackwardi movement of the levers,are formed on a'rmg 25 secured to'the cupped portion of other lever.

, thelever 15?. i The pawl i22'is carried by the signed my. I name;

of a shoe device operating on the chain to take up slack therein including a flexible shoe member, levers to the'free ends of which said member is attached, and automatic means for moving said levers whereby the shoe member isdeflectedand thereby caused'to operate on the chain. i

- 3. The combination with an endless chain, of a shoe deviceoperatingon the chain to takeup slack: therein including afie'X'ible shoe member, levers to thefree'ends of which said member isiattached, means for moving said levers whereby the shoe member is caused to operate onthe chain,"-and means for prevent-- ing the shoe member from returning to positions of looser adjustment. I

. 4. The combination wi 'han endless chain, of a shoe device operating on the chain to take up slack therein including a shoe member, pivoted arms carrying said member, a pin on which said arms pivot and spring means tending to impart. pivotal movement to the arms in a direction to cause the shoe member to take up slack in the chain.

'In testimony whereof I have hereunto FRANK L... MORSE.

.In Fig. 6 a modifi'cation isshown empl'oyzo ing. compressionsprings 26, and 27 acting on the ends-of the levers 15 and 16*, respectively.

,Itefferring to the modification shown in Fig, 7 it will loejseen that two spaced pivot pins 28 and 29 are provided, and that the. i 85 lever ,i s pivoted on the pin 28 and the -lever.16; on the pin 29. A tension spring I F is c onnected at one end to the lever 15? and at the other endto the lever 16 to function a manner: similartothe spring QO of the preferred form. In this instance, ratchet ;teeth 21 are provided on each lever having as- -sociatedtherewith the spring pressed'pawls, 22ffyand 22 for the purpose of; preventing backward movement ofthe levers;

;, 1-0 the foregoing, it will be seen that I have; provided an "adjusting device having very few parts, whichparts are of; simple U construction whereby the device may be, in ,Iexpensively manufactured. In this connecaccordance; with my invention is very little.

I claim i ;-ti n,;it.is pointed out that in Figs. Ito-'3, I

;l. The combination with an endless chain, q ,of ashoe device operating on the chain to take .gu-p slack; therein including a flexible shoe? membenlevers tothe freeends'ot which said --.-.-member is attached, and means for moving- 1.1 53116. levers whereby the shoe .memberis de-' and thereby caused to operate on the he combination with an endless chain, I 

